Sunflowers, Yellow Tulips, Craspedia, and Eucalyptus. About Flowers : Yellow flowers burst with happiness. They symbolize the bonds of friendship, the taste of success and pride. Joy is also one of the meanings of this flower, as that is one of the feelings the color is said to evoke. Care Instruction : When your flowers arrive in a bunch form, remove the packing and allow them to breathe. Cut 1-2 inches of the stems, remove the leaves below the waterline, and put the flowers in a vase with clean water.